"A party where once you walk in the door, you are obligated to have sex. I would think that these parties often disguise themselves as costume parties or birthday parties or baby showers but THEN as soon as they entice people in the door, they are all "guess what this actually is? It's a mandatory sex party, bitch!"
I went to Allie's blog expecting some kind of awesome party with lots of pie, but as soon as I got there everyone was like "guess what this actually is? It's a mandatory sex party, bitch!" and then the raping of my eyeballs with awesomeness commenced.